Customize Promo Code Message saying “‘This coupon does not apply to items in cart” displayed on the Checkout Page of a Site Builder Web Store

User may want to customize the Promo Code Message appearing on the Checkout page. 

1. Navigate to Commerce > Site Builder > Customize Text

2. Click Customize

3. Click Error Messages

4. Look for ‘This coupon does not apply to items in cart.’

5. On the box beside it, set the desired warning message

6. Click Save